A group of private-equity firms, including Carlyle Group LP, have withdrawn from a $1.9 billion offer to take Shanda Games Ltd. private, the Chinese online-game company said Wednesday.

China-focused firm FountainVest Partners and Chinese private-equity player Primavera Capital have also pulled out from the consortium. The group was backing efforts by Shanda Games' controlling shareholders to buy out the game company. Perfect World Co., a Chinese rival, has also left the consortium, Nasdaq-listed Shanda Games said.